Neuroscience

Nervous system discovery overturns previous theory

It appears that when the nervous system is developing, only the most viable neurons survive, while immature neurons are weeded out and die. This is shown in a groundbreaking discovery by researchers at Karolinska Institutet ...

Neuroscience

Memories of movement are replayed randomly during sleep

Sleep is far from an inactive time for the brain: while rats (and humans) are asleep, neurons in the hippocampus fire rapidly. After a rat has repeatedly moved from one spot to another, the same neurons that fired while the ...

Neuroscience

Brain activity map reveals how infant vision develops

Visual functions, such as the perception of motion direction, start to develop soon after birth and continue to mature over time as infants gain more experience with the world. However, direct evidence of how this maturation ...

Medical research

Research suggests origins of key cells in the thymus

Medullary thymic epithelial cells (mTECs) allow the thymus to ensure that the body's T cells are able to distinguish between potentially harmful foreign antigens and those that are produced by the body itself. A Swiss-Japanese ...